Testing and monitoring AI
Tools that check model and agent output quality, trace what happened, and catch failures.
Who is making money
The companies earning or raising real money in this part of AI. Suppliers are marked: they sell to the builders rather than to end users.
Networking giant that agreed to buy Galileo in April 2026 to add AI monitoring to its Splunk observability products.
About $4B of AI infrastructure revenue in fiscal 2026 (year to July 2026)
Open profileopen-source monitoring
Bought by ClickHouse (Jan 2026)
Open profileRuns a fast open-source database used for analytics. Bought Langfuse to add AI tracing to its stack.
Completed a $400M Series D alongside the Langfuse deal (Jan 2026). Valuation not in the source
Open profileTests AI models for hallucinations, errors and safety problems, and monitors them once they are live.
Total funding about $68M. Its $45M Series B was led by Scale Venture Partners (dated Oct 2024 by CB Insights)
Open profiletracing for LangChain apps
LangSmith annual recurring revenue reported at $12M to $16M (TechCrunch, 2025). Not confirmed by the company
Open profilemonitoring
$70M Series C (2025)
Open profiletesting and monitoring
$80M at about $800M valuation (Feb 2026)
Open profileEvaluates LLMs and AI agents for accuracy and safety, and builds simulated worlds to test agents.
Company says revenue grew more than 15 times in the past year. Not audited
Open profileWhere the money flows
Engineering teams pay per seat or per volume of traced calls.
acquired Langfuse
clickhouse.comagreed to buy Galileo to add AI monitoring to Splunk
usagepricing.com
The openings
Gaps still open in this area, from ones a small business could take to ones only giants can play.
- Small business Testing and monitoring client agents as a managed service
- Small business Industry-specific test sets (legal, finance) sold with reports
- Startup money Agent security and governance platform
Monitoring is being absorbed into bigger platforms, so standalone tools may become features.
Sources: agentmarketcap.ai, neuronfeed.com
The map updates three times a week.
241 companies across 25 areas, 62 money flows and 89 openings so far. New research lands every Tuesday, Thursday and Saturday.
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